Bath tub



FIG. 1 is a front perspective view of the bath tub showing my new design;

FIG. 2 is a perspective view thereof showing the rear side of the bath tub that is generally in contact with a wall;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a left side view thereof wherein a quadrilateral transparent wall that has two lateral convergent edges is visible;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a rear side view thereof (shown upside-down with respect to the view of FIG. 4) illustrating the rear side shown in FIG. 2. 

I claim the ornamental design for a bath tub, as shown and described. 